SQL joins visualy explained

Great explanation / tutorial of Concurrency in Java (link)

http://tutorials.jenkov.com/java-concurrency

Collect data for the next job interview

Write down what you worked on, what your role was, what the challenges were, things that went wrong, successes that you had. These are all questions that are asked in interviews and you will be glad that you got a jump on crafting these stories and are able to recall critical details.

Taken from here https://www.linkedin.com/pulse/article/20141017142526-5336185-even-if-you-re-employed-7-steps-to-take-now?midToken=AQEENZ3q5Ct1zQ&trk=eml-b2_content_ecosystem_digest-recommended_articles-179-null&fromEmail=fromEmail&ut=30VXzahYK5Ems1

Link on good tool for sharpening regexp skills

http://www.regexr.com

Link on Algorithms lessons resources (in RUS)

http://oim.asu.kpi.ua/courses/theory-of-algorithms/

HashTable (link RUS)

https://ru.wikipedia.org/wiki/Хеш-таблица#.D0.9C.D0.B5.D1.82.D0.BE.D0.B4_.D1.86.D0.B5.D0.BF.D0.BE.D1.87.D0.B5.D0.BA

Bitwise wiki (Link RUS)

https://ru.wikipedia.org/wiki/Битовые_операции#.D0.9F.D0.BE.D0.B1.D0.B8.D1.82.D0.BE.D0.B2.D0.BE.D0.B5_.D0.98_.28AND.29

SQL tutorial (link)

http://www.tutorialspoint.com

SOLID explanation (link)

http://howtodoinjava.com/2013/06/07/5-class-design-principles-solid-in-java/

How to update browser cache in java with Spring (link)

http://stackoverflow.com/questions/10891986/how-to-update-browser-cache-in-java

http://code.tutsplus.com/tutorials/solid-part-2-the-openclosed-principle--net-36600